Re: coroutine.resume() crash

[Xmilia Hermit <xmilia.hermit@...>]

 John Dunn:

> static int timer_call_after(lua_State* L)
> {
>    std::cout << __FUNCTION__ << std::endl;
>    timer_t** timer = (timer_t**)lua_newuserdata(L, sizeof(timer_t*));
>    *timer = new timer_t();
>    (*timer)->L = L;
When the coroutine version is running L is not the main Lua state but 
the one from the coroutine making the trigger method calling "function() 
coroutine.resume(co) end" on the same thread as co.
>    // store function
>    lua_pushvalue(L, 1);
>    (*timer)->handler_index = luaL_ref(L, LUA_REGISTRYINDEX);;
>
>    // stash timer
>    the_timer = *timer;
>    return 0;
> }
>
>
> const char* bad_lua = R"XXX(
> function wait(time)
>    co = coroutine.running()
>    Timer.CallAfter(function() coroutine.resume(co) end, time)
In the coroutine case the callback is called on the co thread and 
resumes it with a wrong stack layout.
>    return coroutine.yield()
> end
Instead of using the current Lua state with the timer the main Lua state 
should call the callback.

Regards,
Xmilia